"James Hetfield has, like, a thousand riffs and they're all great. His worst riff would be another band's best riff. So we're blessed… the blessing is also a curse, because we have so many cool ideas that it becomes challenging to decide what should not survive, at least for me, from where I'm sitting. I'm always like, 'Well that's a good riff!' and James might be, like, 'Eh, nah, I don't like it.' You know what I mean? But then again, maybe two weeks later he may like it. But you gotta have some sort of process of elimination. So that's what we've been going through."